Nut lock



Feb. 24, 1931.

G. CABBAGE NUT LOCK Filed July 15, 1929 @01 (m2! e :I

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Iatented Feb. 24, 1931 UNITED STATESPATENT OFFICE GEORGE GABBAGE,OF EVANSVILLE, INDIANA V Norman-q Application filed Jul 15, 1929. Serial No. 378,536.

the fishplate, thereby insuring a tight grip.-

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed may be made within the scope of what is claimed, without departing from the spirit of the invention.

In the accompanying drawings the preferred form of the invention has been shown.

I washer, preferably of hard steel, the same being split so as to provide terminals 2 and 3 offset in opposite directions to produce noses 4. One edge of the washer is formed with teeth 5 extending from the outer tothe 49 inner peripheries of the washer. These teeth are not radially disposed but are tangent to an imaginary circle concentric with the washer. All of the teeth are shaped like ratchet teeth so as to bite into a surface when an attempt is made to rotate the washer in one direction.

The washer is of uniform thickness except for the recesses between the teeth and is adapted to be placed about a'bolt B between 59 a fishplate F and a nut 6. This nut, which is adapted to be screwed on to the bolt, is formed in one face with radial teeth 7that preferably divide the nut into quarters. After the parts have been assembled, the

nut. is tightened on the bolt and the teeth 7 will slip over the adjacent nose A while at the sametime'the teeth 5 will be pressed to- Ward the adjoining surface of the fishplate F.

The washer will'be gradually straightened out or flattened as the nut is screwed in 6 place until-finally the B0884 extending from that face of the washer on which the teeth 5 V are located will be pressed back into the same plane with the active edges of. the teeth and said nose as well'as all of the teeth will be forced into the engaged surface. At the same time the other nose will remain in engagement with one of the teeth 7 of the nut. This arrangement will operate efficiently to prevent the nut from being unscrewed from the bolt.

While the nut lock has been shown applied to the fishplate F of a rail B, it is to be understood that itcan be used on bolts whereever employed, c

It is to'be understood that these improvements can'be used with nuts of all shapes and sizes. p i

WVhat is claimed is:

The combination with a platelhaving a 8 flat surface, and a bolt'extending through c the plate, of a split washer mounted on the bolt and having its terminals offset inops posite .directions respectively to provide noses, an: annular series of ratchet teethon 7 one face of the washer'extending from the inner to the outer periphery thereof, said 1 1 Y teeth being tangent to an imaginary circle concentric with the washer and adapted to;

bite into the flat surface of the plate, and a nut engaging the bolt provided with radial teeth for engagement with one of the noses, said nutconstituting means for flattening the washer and to force the other nose and the teeth into the flat surface of the plate. In testimony that I claim the foregoing as my own, I have hereto afiixed my signature.

GEORGE CABBAGE. 

